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Method for determining pore diameter of shale reservoir

A technology for shale reservoir and pore diameter, which is applied in the analysis of suspensions and porous materials, measuring devices, instruments, etc., can solve problems such as difficulty in describing shale pore characteristics, and achieve the effect of simple operation.

Inactive Publication Date: 2017-03-22
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a method for determining the diameter of shale pores, which effectively solves the technical problem of difficulty in describing the characteristics of shale pores, and can quickly and effectively determine the size of shale pore diameters

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  • Method for determining pore diameter of shale reservoir
  • Method for determining pore diameter of shale reservoir
  • Method for determining pore diameter of shale reservoir

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Embodiment 1

[0040] This embodiment provides a method for determining the size of shale pore diameter, which includes the following steps:

[0041] 1) A total of 45 samples were taken from 9 coring wells in the Fuxian-Xiasiwan area of ​​the Ordos Basin at the corresponding depths of 1139.1-1625.24m (Chang 7 Member) and 1360-1754.43m (Chang 9 Member) , the samples are relatively evenly distributed in the study area, and all belong to continental shale.

[0042] 2) Nitrogen adsorption and desorption experiments were carried out on these samples with a specific surface measuring instrument Quadrasorb SI. The experimental process adopted the domestic standard GB / T19587-2004, and the samples were heated at 90°C for 1 hour and at 350°C for 5 hours. Under the condition of -196.15°C, the corresponding adsorption volume was measured continuously at the relative pressure in the range of 0.004-0.995.

[0043] Table 1

[0044]

[0045] 3) After obtaining the relative pressure and corresponding ad...

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Abstract

The invention provides a method for determining the pore diameter of a shale reservoir. The method comprises the following steps: collecting a shale reservoir sample from a study area; conducting a nitrogen physical absorption and desorption experiment on the shale reservoir sample with a nitrogen physical absorption instrument to obtain absorption and desorption data of the shale reservoir sample; according to the gas absorption quantity V1 and the relative pressure P1 of nitrogen in an adsorption process in the absorption and desorption data, conducting linear fitting on lnV1 and lnln(1 / P1) to obtain linear relationship between lnV1 and lnln(1 / P1), and obtaining a slope K according to the linear relationship; according to the slope K, calculating the pore diameter R of the shale reservoir sample. The provided technical scheme is simple in operation, can accurately calculate the pore size of the shale reservoir, and provides a new idea for the evaluation of the shale reservoir.

Description

technical field [0001] The invention relates to a method for determining the pore diameter of a shale reservoir, belonging to the technical field of shale reservoir evaluation. Background technique [0002] The characterization of shale reservoir pores is very important for the exploration and development of shale oil and gas. Shale oil and gas are stored in shale pores. The size of shale pores determines the amount of oil and gas in the reservoir, and the size of the channels connecting shale pores determines the difficulty of shale oil and gas flow. Therefore, the description of shale pore characteristics is of great significance to the evaluation of shale oil and gas reserves and the exploration and development of shale oil and gas. [0003] So far, the description of shale pore structure at home and abroad is mostly in the stage of qualitative description, and the characteristics of shale pores are qualitatively described mainly through experiments. The main research me...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088G01N2015/0873
Inventor 姜福杰陈迪陈健徐源
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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